int max = 100;
            System.Linq.Enumerable.Range(1, max).ToList().ForEach(i =>
            {
                string value = "0000000" + i.ToString();
                Console.WriteLine("{0}{1}", DateTime.Now.ToString("yyyyMMddhhmm"), value.Substring(value.Length - 5));
            });

------解决方案--------------------
C# code
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine(CreateOrderNumber("20120117091100001"));
        }

        /// <summary>
        /// 生成新订单号
        /// </summary>
        /// <param name="thisOrderNumber">当前订单号</param>
        /// <returns>返回新订单号</returns>
        public static string CreateOrderNumber(string thisOrderNumber)
        {
            string num = thisOrderNumber.Substring(12, 5);
            int newNum = int.Parse(num) + 1;
            return DateTime.Now.ToString("yyyyMMddHHmm")+newNum.ToString().PadLeft(5,'0');
        }
    }

------解决方案--------------------
肯定要涉及数据库操作的吧，否则很容易出现重复的